At 500°C the equilibrium constant, KP , is 4.00 ´10–4 for the equilibrium: 2HCN(g) Picture H2(g) C2N2(g) What is Kp for the following reaction? H2(g) C2 N2(g) Picture 2HCN(g) A. 2.00 ´ 10–4 B. –4.00 ´ 10–4 C. 1.25 ´ 103 D. 2.50 ´ 103 E. .00 ´ 104